aLIGO HAM-ISI, Test Report, Phase I: Assembly Validation, LHO Unit #1
- Document #:
- LIGO-E1000310-v7
- Document type:
- E - Engineering documents
Other Versions:
| LIGO-E1000310-v4
07 Feb 2012, 18:39 |
- Abstract:
- This unit was first assembled and tested in 2010, until June 17th 2010. Following the discovery of un-authorized repairs, the Unit was disassembled. Testing done before disassembly can be seen under v1 of this document. The unit was re-assembled and tested early 2012. The assembly was validated on February 16th 2012.
Particularities:
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-Test GS13 were used. Production GS13s have to be installed, and tested, before in-chamber installation of the unit.
-No L4C Complementary inquiry:
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-Investigation of the effect of the top mass’s boundary conditions on the TF of HAM-ISIs. Minor issues that don’t imply further work:
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-CPS gap measurement with a jig was waived to avoid scratching targets
-Stage 0 level is out of requirements
-Blade #1 spring profile slightly out of requirements
-Adjustment of locker D is borderline
-Excessive STD measured on CPSs is associated to ground motion Minor issues that imply further work:
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-Actuators linearity is within requirement. However the average slope deviation is out of spec. It seems to correlate with the cable+actuator resistance measurements. This observation needs to be correlated with the final measurements made with the in-field cables.
-Damping loops implementation and testing were waived and need to be performed during the next phase of testing.
- Files in Document:
- Other Files:
- Topics:
- Notes and Changes:
- Cable S/N updated
- Related Documents:
- Referenced by:
- LIGO-E1100996: aLIGO HAM-ISI, Phase I Testing Reports